A Combination Self Adjusting Endocervical / Exocervical Sampling Device and Cell Transport / Preservation System

ABSTRACT

The device consists of a shaft with a detachable brush tip. The brush tip is a new design incorporating the utility of an expandable self adjusting area that yields a complete sample of the endocervix and exocervix regardless of varying individual anatomy. The head will have protrusions disposed at strategic positions with flat surface collection areas. A ledge with protrusions will sample the exocervical area and a middle portion will sample the endocervical area. The brush tip is matched to a special collection container that permits the brush tip to be detached and deposited into said container without the handling of the brush/head area. In this fashion and utility the sampled cellular material can be completely, safely, and securely transported for laboratory evaluation.

BACKGROUND OF THE INVENTION

This invention relates to the field of Cervical Cancer Screening with a new design and utility of both the sampling brush and transport system.

A pap smear is the most important screening tool to diagnose cervical cancer. The cervix has two cell types to sample. Both of these cell types need to be seen by the pathologist with each and every pap screening sample. Cancers of the cervix develop both in the exocervical and endocervical canal. Unfortunately the endocervical canal cannot be seen by the physician or healthcare provider. Due to this fact cancer of the cervix can be missed if the entire length of the endocervical canal is not sampled.

Currently there is no device available to the healthcare provider that will automatically adjust to the individual Endocervical length and guarantee complete sampling. Currently the only way for the healthcare provider to guarantee sampling is with a two step process using two separate instruments.

Older combination brush designs that sample both the endocervical and exocervical cells have no method employed that will guarantee that they have completely sampled the entire canal of the cervix. An example of this is the patient with a long endocervical canal which prevents the physician from discerning if the top of the cervix has been reached.

This brush design is self adjusting to the complete length of the endocervical canal.

Older brush and container designs require the brush to be washed in a solution within the container for cell collection. The brush, with still valuable cells, is then thrown away. Alternatively other current systems require the physical removal by handling and/or snapping off the brush or device tip. This has a drawback in that a loss and disruption of cellular material by human manipulation occurs when attempting to remove the brush tip from the shaft.

With this more versatile design the top of the brush can remain with the container after its removal from the shaft. All of the drawbacks of the earlier designs are eliminated with this new transport system. Operator's hands need not touch the brush tip, preservative or sampled material. Not one collected cell is lost. Safely and cleanly removing the brush tip from the shaft without contamination to the healthcare providers is also achieved with this system. There is no exposure to the mucous, blood, and cells of the cervix.

SUMMARY OF THE INVENTION

This invention will incorporate a new design in cervical sampling brushes. It also incorporates a transport system that will eliminate the risk of losing cells due to contamination or poor operator manipulation of the brush head. It will offer extreme ease of use and guarantee 100% collected cell retention and preservation.

Herein is the Exocervical/Endocervical Combination Brush. A unique design with utility to adjust for the varying endocervical canal length. As with other brush designs, there is a shaft (stem) which is ergonomically designed for easy maneuverability by the healthcare provider. The stem will have an approximate length of 15-18 cm. At the opposite end will be attached a removable tip that incorporates the newly designed adjustable brush.

The removable tip is where this design is completely different than any previous sampling brush. It is similar in that it will have protrusions, or flags, to sample the cells of the cervix. The difference is in the design of the shaft and it's attachment to the brush tip at the most distal portion, not the most proximal as in all other tip designs. Also, the mid portion of the removable tip will be manufactured in a flexible, bellows, spiral cut, or similar process, so as the shaft advances into the endocervical canal, the flexible area begins to adjust to the length of the cervical canal. As the process of opening, elongating, or stretching continues it should be noted that the exocervical portion of the brush has already contacted the outer cervix and is now ready to sample the face of the cervix. The combination brush is designed to accommodate varying endocervical lengths thus still being able to sample the complete cervix. Once the brush has been deployed to the proper position as determined by cervical canal length, a sample is taken by rotation of the brush 360 degrees. It shall be noted that the endocervical flags are offset 90 degrees relevant to the exocervical flags as to ensure that they do not interfere with sampling of the endocervical canal. This design addresses all previous problems with similar yet less utilitarian brush designs for cancer screening and has the added benefit of requiring a single step for accurate and complete samples of both the endocervical and exocervical cellular material.

The second part of the new design is the containment system. This container facilitates the collection, preservation, and transportation of the sample. The new design of the vessel provides for an easy single step removal of the brush head without operator contamination and yields the best possible cell collection. The vessel is designed with a cone shaped molded insert witch includes an opening at its base which allowing the brush head to orient itself into said opening. Once past the opening the operator simply rotates the brush approximately ninety degrees and lifts the shaft upward while holding the vessel. The tip will fall off into the preservative. The vessel is then closed normally. The container can then be gently shaken to facilitate cell separation from brush tip.

This container removes the risk of splattering cellular debris. Also eliminated is the risk of contaminating the brush head on removal as is now possible with older brush designs. Further advantage is the elimination of risking valuable cell loss as the operator manipulates old brush styles during stirring and/or tip removal. Therefore, there is a reality of preserving 100% of the collected cellular materials for transport.

BRIEF DESCRIPTION OF THE DRAWINGS OF THE PREFERRED EMBODIMENTS

FIG. 1 of sheet 1 is a cross section view of the containment, preservation, and transport vessel. Brush tip is free from stem and sealed in container for transportation.

FIG. 2 of sheet 1 is a plan view of the 2 piece combination exocervical/endocervical sampling brush. Brush is in its assembled and fully retracted (relaxed) position.

FIG. 3 of sheet 2 is identical to FIG. 2 and has been included on sheet 2 for clarification and consistency when viewed aside FIG. 4, FIG. 5, and FIG. 6 on sheet 2. The purpose is to illustrate the brush in its retracted (relaxed) position.

FIG. 4 of sheet 2 is FIG. 3 rotated 90 degrees to illustrate side plan view.

FIG. 5 of sheet 2 is a plan view of the 2 piece combination exocervical/endocervical sampling brush. Brush is in its assembled and fully extended (elongated) position.

FIG. 6 of sheet 2 is FIG. 5 rotated 90 degrees to illustrate side plan view.

FIG. 7 of sheet 3 illustrates close-up embodiment of the brush head in the fully retracted state. Also demonstrated via the hidden lines are the details of the internal utility of the stem and socket design.

FIG. 8 of sheet 3 illustrates close-up embodiment of the brush head in the fully extended state. Also demonstrated via the hidden lines are the details of the internal utility of the stem and socket design.

FIG. 9 of sheet 4 is an exploded view showing the embodiment and means of assembly of the brush and stem.

FIG. 10 of sheet 4 is a view (A-A) detailing keyed stem design.

FIG. 11 of sheet 4 is a view (B-B) detailing brush shelf, exocervical flags, and endocervical flags as well as their relative positions to each other.

FIG. 12 of sheet 5 is the top view (C-C) of the sealed containment vessel.

FIG. 13 of sheet 5 is the top view (D-D), rotated 90 degrees when compared to FIG. 12, of the open containment, preservation, and transport vessel.

FIG. 14 of sheet 5 is a cross section view of the closed containment, preservation, and transport vessel. Brush tip is free from stem and sealed in container for transportation.

FIG. 15 of sheet 5 is a cross section view, rotated 90 degrees when compared to FIG. 14, of the open containment, preservation, and transport vessel. Brush tip is free from stem and oriented in container.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Cervical Brush

A Combination Self Adjusting Endocervical/Exocervical Cellular Sampling Device.

Referring to the drawings:

In FIG. 2 is shown a combination self adjusting cervical sampling device constructed according to said invention.

In FIGS. 3-6 illustrates the cervical sampler comprising an elongated handle (6) having a free end (7) and a removable head (8).

FIG. 8 shows the removable head section in its elongated position. Rows of flexible endocervical flags (9) are disposed on the center section (10) of head (8). As seen in FIG. 4 and 6, each of the Flags (9) is configured to have two opposing surfaces. The flags are flexible as to cause the least amount of deep penetration of the endocervical tissue. Cells will be collected on the flat surfaces of the flags (9) regardless of rotation of brush. Flags (9) are disposed on center section (10) directly opposed 180 degrees from each other. The Flags are perpendicular to the center section (10). Flags (9) will be tapered in length such that the most distal flags (11) have the shorter length and the most proximal the longest (12).

Flags (9) are integrated into removable head (8) and are part of the expandable and self adjusting center (10). The removable head (8) has a shelf member (13) which is wider, flexible and stronger to support the flags (14). It also acts as a stop for advancement of the removable head onto the cervical “os” allowing the center section to continue advancing to the full depth of the endocervical canal demonstrating its self adjusting utility.

Exocervical flags (14) are parallel to adjustable section (10). Flags (14) are constructed to have the longest length near the center section (10) and shortest length at the ends of the shelf member (13).

Flags (14) will have square or rectangular shape so a firm edge will be available to wipe cellular material from exocervix. Rotation of device can be in clockwise or counter clock wise direction.

The device is introduced into the vagina and then disposed onto the mouth of the cervix; flags (14) will spread out as the device is advanced. The center adjustable section continues to enter the endocervical canal. As the device continues to advance, and resistance to advancement increases at the exocervix, the center section with less resistance continues to advance in the endocervical canal to its full extent. Cervical sample is taken by a 360 degree gentle rotation. Full elongation of the center section (10) is easily perceived by the resistance of the closed internal “os”.

FIG. 9-10 shows new and unique socket and shaft matching male and female components. Shaft (6) has stop collar (15) with noted crisscross guide (16) matched to hub (17) of removable head (8). This prevents slippage of removable head about the axis of rotation. Further distal final section of shaft (18) fits into above said socket notch at the tip of expandable section of removable head (8). Taper fit with most distal portion of expandable section (10) locks shaft (18) in place.

This invention is not restricted to embodiment shown in the drawing by way of example which can be varied in many different ways. It may be constructed with different shapes and number of flags, removable head may also have different shape in relation to flag placement.

Collection Device

The second component is a collection device that will complement the combination cervical brush's removable head. A specially designed vessel is seen to receive, preserve, and transport the brush head.

Referring to the drawings:

FIG. 1 shows threaded lid (1) with seal on container (2). Vessel is constructed with a unique insert (3). It is constructed such that a horizontal opening (4) with conical side wall (5) is formed.

FIG. 13 depicts horizontal opening (4) which is just large enough to easily admit removable head through opening. Enough depth is available to admit head completely below the opening. At this time a 90 degree rotation of the head and shaft will orient removable head in a position that cannot fit through the horizontal opening (4). It is at this time that the operator, now holding vessel, pulls shaft upward allowing the removable head to easily drop from the shaft. The lid is then screwed on for proper seal and eventual transport to laboratory facilities. 

1. Combination Self Adjusting Endocervical/Exocervical Brush Device comprised of an elongated handle and detachable brush head; a multitude of protrusions (flags) projecting from the brush head and projecting both parallel to the handle and perpendicular to the handle, protrusions will be such that a flat edge is used to cause a sweeping action to collect cells of the cervix.
 2. The brush head of claim 1, wherein the parallel protrusions will vary greater in length and cross section with progression toward center of brush head.
 3. The brush head of claim 1, wherein the center portion of the head elongates to accommodate individual anatomies in a plane parallel to said shaft.
 4. The brush head of claim 1, wherein the unfolding, elongation, or similar extension of the brush head will allow protrusions to assist to contact endocervical canal to its full extent.
 5. The brush head of claim 1, wherein the center expandable section protrusions will progressively get longer in length toward base of head.
 6. The brush head of claim 1, wherein the head will be of an elastic construction in the center section of an FDA approved material for cell collection.
 7. The brush head of claim 1 wherein, the head will have a smaller configuration (dimension) in its most distal area.
 8. The brush head of claim 1 wherein, the protrusions will be in the center expandable area 180 degrees opposed to each other and 90 degrees opposed to exocervical parallel protrusions.
 9. The brush head of claim 1 wherein, the rotation of the shaft and brush head will produce a sweeping cell collection process.
 10. The brush head of claim 1 wherein, the protrusions will have a flat collection area with a concave support back.
 11. Collection device that will accommodate shaft and brush tip and will cause said tip to fall into container without necessitating the manual handling, touching, snapping off, or contacting the brush tip whatsoever as to collect the cells.
 12. A device as claimed in claim 11 wherein the container will have cellular preservative for storage and transportation of cells and brush tip.
 13. A device as claimed in claim 11 wherein the container will have a plastic insert that will be joined in such a fashion as brush tip will orient and pass thru fitted slot.
 14. A device as claimed in claim 11 wherein once the brush tip is below fitted slot opening, rotation of said shaft 90 degrees in either direction then pulling up gently thereafter will cause brush tip to fall into preservative.
 15. A device as claimed in claim 11 wherein lid is then placed with standard thread locking for complete sealing.
 16. A device as claimed in claim 11 wherein container and lid is made of FDA approved plastics for cell preservation.
 17. A device as claimed in claim 11 wherein the lid or cover will have accessible area for automatic extraction of sample content. 